Exam 13: Basic Statistical Concepts and Tests

If you wanted to compare the heights of a random sample of 5-year olds in Texas with that of the entire population in the United States, which statistical test would you use?

Which P value indicates that there is a less than 10% chance of the observation occurring by chance?

Calculate and enter the mean, median and mode for the following numbers: 1, 7, 9, 2, 1 Mean ___________ Median ___________ Mode ___________

Variables that can have an infinite number of fractional values are called _______________.

This is a statistical measure of the spread of the values of a quantitative variable around the mean.

Type I error happens when statistically significant differences are erroneously discovered between two sets of observations when none really existed.

This type of distribution is a symmetrical bell-shaped curve that represents the distribution of a quantitative variable.

The __________________ is the interval between two numeric values within which the true value of a variable is expected to lie with a high level of probability.

This type of variable can only be assigned one of two possible values, such as yes or no.

In statistical analyses, ________________ refers to a specific group of individuals who are the primary focus of interest.

Which of the following is an example of systematic sampling?

Any characteristic, material, or attribute of someone or something that can be measured with or without an instrument or device is known as a:

Which of the following are examples of continuous variables?

Correlation implies that one of the variables depends on the other.

Categorical variables have a numeric value.

A hypothesis must be based on a substantial amount of evidence.

In statistics, the term ______________ refers to the value that is at the midpoint in a data set when data are arranged in a numerically ascending or descending order.

Which of the following correlation coefficients would indicate a strong a positive relationship between two variables?

In statistics, _______________ means the number of times an event, observation, or data value occurs in a data set.

________________ analysis examines the simultaneous relationship of one or more independent variables with another variable, with the assumption that the values of the latter depend on the values of the former.